Sri Bhoga Nathar (Bogar/Bhogar)- 300 B.C.Bhogar made Palani Lord Dandayudhapani Idol through the alchemy method by using 9 poisons metal with navapasanam. “ The plant will convert metal into metal oxide by oxidation to utilize as nutrients for their growth. The same way our sidhars converted metal oxide to metal by reverse reaction using plant extracts by the reduction to prepare metal colloids.”This an example for nanocomposit .ByG. Dharanivasan.See More